Activation system information transmission method, apparatus, and device

ABSTRACT

The present invention provides an activation system information transmission method, apparatus, and device. The method includes: receiving, by UE, a first system message sent by a base station, where the first system message includes activation indication information and a change indication tag, the activation indication information is used to indicate whether a function indicated in an activation system message is activated, and the change indication tag is used to indicate whether scheduling information of the activation system message changes; obtaining, by the UE, first scheduling information of the activation system message according to the activation indication information and the change indication tag; and reading the activation system message according to the first scheduling information, and selecting, according to the activation indication information and the change indication tag, different manners to obtain the first scheduling information of the activation system message.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.16/035,293, filed on Jul. 13, 2018, which is a continuation ofInternational Application No. PCT/CN2016/085476, filed on Jun. 12, 2016.The International Application claims priority to InternationalApplication No. PCT/CN2016/070913, filed on Jan. 14, 2016. All of theafore-mentioned patent applications are hereby incorporated by referencein their entireties.

TECHNICAL FIELD

Embodiments of the present invention relate to communicationstechnologies, and in particular, to an activation system informationtransmission method, apparatus, and device.

BACKGROUND

Mobile communication has profoundly changed people's life, but peoplenever stop pursuing higher-performance mobile communication. A 5^(th)Generation (5G) mobile communications system emerges, so as to deal withan explosive growth of mobile data traffic, massive device connections,and various new emerging services and application scenarios in thefuture. As an important part of 5G, Internet of Things witnesses a rapidgrowth in market demand. Currently, the 3^(rd) Generation PartnershipProject (3GPP) is studying how to carry an Internet of Things (IoT)service based on a cellular network by designing a new air interface andmaking full use of a feature of a narrowband technology. This type ofIoT is referred to as NB-IoT. Compared with a conventional cellularnetwork, in an NB-IoT network, a service and a terminal device have thefollowing requirements and features: a low service rate, a long period,massive connections, a low cost, low power consumption, and the like.

For the NB-IoT network, a system solution is re-designed in response tothe foregoing requirements and features of the NB-IoT network, theservice, and the terminal. A new access control mechanism is introducedin NB-IoT due to a low cost requirement. An access control parameter isplaced in an independent system information block (SIB). FIG. 1 is aschematic diagram of NB-IoT access control. As shown in FIG. 1, a systemmessage includes a master system message (Master information Block, MIB)that includes a most important system parameter of a system, a SIB 1that carries cell access control information and scheduling informationof another system information block, a SIB 2 for radio resourceconfiguration, a newly added SIB_AC for access control, and other SIBs.When a network is lightly loaded and access control is not performed, anaccess control (AC) resource is not scheduled and the SIB_AC is notsent, either. When a network is overloaded and access control needs tobe performed, an AC resource is scheduled and the SIB_AC needs to besent. In this way, when an AC function is enabled or disabled, becausescheduling information that is in the SIB 1 and that is corresponding tothe AC function also changes, user equipment (UE) always needs to readthe SIB 1 to obtain updated scheduling information when the accesscontrol function is enabled or disabled.

However, because NB-IoT supports a coverage enhancement feature andnarrowband system bandwidth, and transmission time of a SIB 1 message isrelatively long, the UE continuously performs detection and reception,and power consumption of the UE increases.

SUMMARY

Embodiments of the present invention provide an activation systeminformation transmission method, apparatus, and device, so as to resolvea problem that because NB-IoT supports a coverage enhancement featureand narrowband system bandwidth, and transmission time of a SIB 1message is relatively long, UE continuously performs detection andreception, and power consumption of the UE increases.

A first aspect of the present invention provides an activation systeminformation transmission method, including:

receiving, by UE, a first system message sent by a base station, wherethe first system message includes activation indication information anda change indication tag, the activation indication information is usedto indicate whether a function indicated in an activation system messageis activated, and the change indication tag is used to indicate whetherscheduling information of the activation system message changes;

obtaining, by the UE, first scheduling information of the activationsystem message according to the activation indication information andthe change indication tag; and

reading, by the UE, the activation system message according to the firstscheduling information.

In this solution, the UE determines, according to the activationindication information and the change indication tag in the first systemmessage, whether to obtain the first scheduling information from the UEor obtain the first scheduling information from a system messagebroadcast by the base station, and after obtaining the first schedulinginformation, reads the activation system message at a locationcorresponding to the first scheduling information, and completes accessto a service according to an indication in the activation systemmessage.

With reference to the first aspect, in a first possible implementationof the first aspect, the obtaining, by the UE, first schedulinginformation of the activation system message according to the activationindication information and the change indication tag includes:

detecting, by the UE, whether the scheduling information of theactivation system message is locally stored;

if the scheduling information of the activation system message islocally stored, determining, by the UE according to the activationindication information, whether the function indicated in the activationsystem message is activated;

if the function indicated in the activation system message is activated,determining, by the UE according to the change indication tag, whetherthe scheduling information of the activation system message changes; and

if the scheduling information of the activation system message does notchange, using the locally stored scheduling information of theactivation system message as the first scheduling information.

In this solution, the UE first determines whether the schedulinginformation of the activation system message is locally stored; if thescheduling information is locally stored, when the activation indicationinformation indicates that the function in the activation system messageis activated, the UE determines, according to the change indication tag,whether the scheduling information of the activation system messagechanges; and if the scheduling information of the activation systemmessage does not change, the UE uses the locally stored schedulinginformation as the first scheduling information, and receives theactivation system message on a resource indicated in the firstscheduling information.

In this solution, if the scheduling information of the activation systemmessage is not locally stored, the UE receives a second system messagesent by the base station, where the second system message includes thefirst scheduling information of the activation system message andscheduling information of a conventional system message.

Optionally, if the scheduling information of the activation systemmessage is not locally stored, and the function indicated in theactivation system message is activated, the UE receives a second systemmessage sent by the base station, where the second system messageincludes the first scheduling information of the activation systemmessage and scheduling information of a conventional system message.

Optionally, if the scheduling information of the activation systemmessage changes, the UE receives a second system message sent by thebase station, where the second system message includes the firstscheduling information of the activation system message and schedulinginformation of a conventional system message.

The foregoing solutions mean: After receiving the first system message,if the scheduling information of the activation system message is notlocally stored, or the scheduling information of the activation systemmessage is not locally stored and the function indicated in theactivation system message is activated, or the scheduling information ofthe activation system message changes, or the scheduling information ofthe activation system message changes and the function indicated in theactivation system message is activated, or the like, the UE furtherneeds to obtain the scheduling information of the activation systemmessage by receiving the second system message broadcast by the basestation.

With reference to any one of the foregoing solutions, the method furtherincludes:

updating, by the UE, the locally stored scheduling information of theactivation system message to the first scheduling information. Thesolution means: After obtaining the first scheduling information of theactivation system message, the UE needs to store the first schedulinginformation, and if the scheduling information is locally stored, the UEupdates the scheduling information, that is, deletes the originalscheduling information and updates the original scheduling informationto the first scheduling information; or if the scheduling information isnot locally stored, the UE directly stores the first schedulinginformation.

In a specific implementation, if the change indication tag is a valuetag, the determining, by the UE according to the change indication tag,whether the scheduling information of the activation system messagechanges includes:

if the UE detects that the value tag changes, determining that thescheduling information of the activation system message changes; or ifthe UE detects that the value tag does not change, determining that thescheduling information of the activation system information does notchange.

With reference to any one of the foregoing solutions, the activationsystem message includes an access control message. The access control(AC) message is used as an example. With reference to the background,the essence of this solution is to introduce a bit in a MIB to indicatewhether an access control mechanism is enabled. The MIB includes achange indication tag that is used to indicate whether the schedulinginformation changes. In any case, the base station adds schedulinginformation of an SIB_AC to scheduling information of a SIB 1. When itis determined that the access control function is deactivated, the basestation does not send the SIB_AC; or when it is determined that theaccess control function is activated, the base station sends the SIB_AC.The UE may determine, according to the change indication tag and theactivation indication information in the MIB, whether to read thescheduling information of the SIB_AC sent by the base station.

A second aspect of the present invention provides an activation systeminformation transmission method, including:

generating, by a base station, a first system message, where the firstsystem message includes activation indication information and a changeindication tag, the activation indication information is used toindicate whether a function indicated in an activation system message isactivated, and the change indication tag is used to indicate whetherscheduling information of the activation system message changes; and

broadcasting, by the base station, the first system message, so that UEobtains first scheduling information of the activation system messageaccording to the activation indication information and the changeindication tag, and reads the activation system message according to thefirst scheduling information.

The base station broadcasts the first system message. The UE determines,according to the activation indication information and the changeindication tag in the first system message, whether to read thescheduling information that is of the activation system message and thatis sent by the base station or obtain the scheduling information of theactivation system message from the UE, and then receives the activationsystem message at a resource location indicated in the schedulinginformation.

Further, the method further includes:

generating, by the base station, a second system message, where thesecond system message includes the scheduling information of theactivation system message and scheduling information of a conventionalsystem message; and

broadcasting, by the base station, the second system message and theactivation system message if the activation indication informationindicates that the function indicated in the activation system messageis activated; or

broadcasting, by the base station, the second system message if theactivation indication information indicates that the function indicatedin the activation system message is not activated.

In this solution, the base station generates the second system messagethat includes the scheduling information of the conventional systemmessage and the scheduling information of the activation system message,but needs to determine whether the function indicated in the activationsystem message is activated. If the function indicated in the activationsystem message is activated, the base station needs to simultaneouslybroadcast the second system message and the activation system message;or if the function indicated in the activation system message is notactivated, the base station only needs to broadcast the second systemmessage.

In any one of the foregoing solutions, the change indication tag is avalue tag.

Specifically, the generating, by a base station, a first system messageincludes:

changing, by the base station, the value tag when it is determined thatthe sent scheduling information of the activation system messagechanges; or

changing, by the base station, the value tag when determining that thebase station changes from a state in which the base station does notsend the scheduling information of the activation system message to astate in which the base station sends the scheduling information of theactivation system information, or the base station changes from a statein which the base station sends the scheduling information of theactivation system message to a state in which the base station does notsend the scheduling information of the activation system information; or

skipping, by the base station, changing the value tag when determiningthat the base station changes from a state in which the base stationdoes not send the scheduling information of the activation systemmessage to a state in which the base station sends the schedulinginformation of the activation system information, or the base stationchanges from a state in which the base station sends the schedulinginformation of the activation system message to a state in which thebase station does not send the scheduling information of the activationsystem information.

This solution means: In a process of generating the first systemmessage, the base station needs to determine the value tag. The valuetag is specifically determined in the following manners. In a firstmanner, if the base station determines that scheduling information thatis of the activation system message and that is sent last time isdifferent from current scheduling information, that is, the schedulinginformation of the activation system message changes, the base stationneeds to change the value tag, that is, change the value tag to a valuedifferent from a last value for determining by the UE. In a secondmanner, if the base station determines that the scheduling informationof the activation system message is not sent last time, but thescheduling information of the activation system message is sent thistime, or the scheduling information of the activation system message issent last time, but the scheduling information of the activation systemmessage is not sent this time, the base station may change the valuetag, or may not change the value tag, based on implementation of thebase station.

In a specific implementation, the activation system message includes anaccess control message. For a specific implementation, refer to thedescription of a UE side.

A third aspect of the present invention provides an activation systeminformation transmission apparatus, including:

a first receiving module, configured to receive a first system messagesent by a base station, where the first system message includesactivation indication information and a change indication tag, theactivation indication information is used to indicate whether a functionindicated in an activation system message is activated, and the changeindication tag is used to indicate whether scheduling information of theactivation system message changes;

a processing module, configured to obtain first scheduling informationof the activation system message according to the activation indicationinformation and the change indication tag; and

a second receiving module, configured to read the activation systemmessage according to the first scheduling information.

Further, the processing module includes:

a detection submodule, configured to detect whether the schedulinginformation of the activation system message is locally stored;

a first determining submodule, configured to: if the detection submoduledetects that the scheduling information of the activation system messageis locally stored, determine, according to the activation indicationinformation, whether the function indicated in the activation systemmessage is activated;

a second determining submodule, configured to: if the first determiningsubmodule determines that the function indicated in the activationsystem message is activated, determine, according to the changeindication tag, whether the scheduling information of the activationsystem message changes; and

a processing submodule, configured to: if the second determiningsubmodule determines that the scheduling information of the activationsystem message does not change, use the locally stored schedulinginformation of the activation system message as the first schedulinginformation.

Optionally, if the detection submodule detects that the schedulinginformation of the activation system message is not locally stored, thesecond receiving module is further configured to receive a second systemmessage sent by the base station, where the second system messageincludes the first scheduling information of the activation systemmessage and scheduling information of a conventional system message.

Optionally, if the detection submodule detects that the schedulinginformation of the activation system message is not locally stored, andthe first determining submodule determines that the function indicatedin the activation system message is activated, the second receivingmodule is further configured to receive a second system message sent bythe base station, where the second system message includes the firstscheduling information of the activation system message and schedulinginformation of a conventional system message.

Optionally, if the second determining submodule determines that thescheduling information of the activation system message changes, thesecond receiving module is further configured to receive a second systemmessage sent by the base station, where the second system messageincludes the first scheduling information of the activation systemmessage and scheduling information of a conventional system message.

Further, the apparatus further includes:

a storage module, configured to update the locally stored schedulinginformation of the activation system message to the first schedulinginformation.

Optionally, if the change indication tag is a value tag, the seconddetermining submodule is specifically configured to: if the UE detectsthat the value tag changes, determine that the scheduling information ofthe activation system message changes; or if the UE detects that thevalue tag does not change, determine that the scheduling information ofthe activation system information does not change.

Optionally, the activation system message read by the second receivingmodule includes an access control message.

A fourth aspect of the present invention provides an activation systeminformation transmission apparatus, including:

a first processing module, configured to generate a first systemmessage, where the first system message includes activation indicationinformation and a change indication tag, the activation indicationinformation is used to indicate whether a function indicated in anactivation system message is activated, and the change indication tag isused to indicate whether scheduling information of the activation systemmessage changes; and

a first sending module, configured to broadcast the first systemmessage, so that user equipment UE obtains first scheduling informationof the activation system message according to the activation indicationinformation and the change indication tag, and reads the activationsystem message according to the first scheduling information.

Further, the apparatus further includes:

a second processing module, configured to generate a second systemmessage, where the second system message includes the schedulinginformation corresponding to the activation system message andscheduling information of a conventional system message; and

a second sending module, configured to broadcast the second systemmessage and the activation system message if the activation indicationinformation indicates that the function indicated in the activationsystem message is activated, where

the second sending module is further configured to broadcast the secondsystem message if the activation indication information indicates thatthe function indicated in the activation system message is notactivated.

Optionally, if the change indication tag is a value tag, the firstprocessing module is specifically configured to:

change the value tag when it is determined that the sent schedulinginformation of the activation system message changes; or

change the value tag when it is determined that the access controlapparatus changes from a state in which the access control apparatusdoes not send the scheduling information of the activation systemmessage to a state in which the access control apparatus sends thescheduling information of the activation system information, or theaccess control apparatus changes from a state in which the accesscontrol apparatus sends the scheduling information of the activationsystem message to a state in which the access control apparatus does notsend the scheduling information of the activation system information; or

skip changing the value tag when it is determined that the accesscontrol apparatus changes from a state in which the access controlapparatus does not send the scheduling information of the activationsystem message to a state in which the access control apparatus sendsthe scheduling information of the activation system information, or theaccess control apparatus changes from a state in which the accesscontrol apparatus sends the scheduling information of the activationsystem message to a state in which the access control apparatus does notsend the scheduling information of the activation system information.

A fifth aspect of the present invention provides user equipment,including a memory that stores a program instruction, a processorconfigured to control execution of the program instruction, and areceiver, where

the receiver is configured to receive a first system message sent by abase station, where the first system message includes activationindication information and a change indication tag, the activationindication information is used to indicate whether a function indicatedin an activation system message is activated, and the change indicationtag is used to indicate whether scheduling information of the activationsystem message changes;

the processor is configured to obtain first scheduling information ofthe activation system message according to the activation indicationinformation and the change indication tag; and

the receiver is further configured to read the activation system messageaccording to the first scheduling information.

A sixth aspect of the present invention provides a base station,including a memory that stores a program instruction, a processorconfigured to control execution of the program instruction, and atransmitter, where

the processor is configured to generate a first system message, wherethe first system message includes activation indication information anda change indication tag, the activation indication information is usedto indicate whether a function indicated in an activation system messageis activated, and the change indication tag is used to indicate whetherscheduling information of the activation system message changes; and

the transmitter is configured to broadcast the first system message, sothat UE obtains first scheduling information of the activation systemmessage according to the activation indication information and thechange indication tag, and reads the activation system message accordingto the first scheduling information.

A seventh aspect of the present invention provides an access controlsystem, including a base station and at least one UE. The base stationis configured to:

generate a first system message, where the first system message includesactivation indication information and a change indication tag, theactivation indication information is used to indicate whether a functionindicated in an activation system message is activated, and the changeindication tag is used to indicate whether scheduling information of theactivation system message changes; and

broadcast the first system message, so that the UE obtains firstscheduling information of the activation system message according to theactivation indication information and the change indication tag, andreads the activation system message according to the first schedulinginformation.

Each UE is configured to:

receive the first system message sent by the base station, where thefirst system message includes the activation indication information andthe change indication tag, the activation indication information is usedto indicate whether the function indicated in the activation systemmessage is activated, and the change indication tag is used to indicatewhether the scheduling information of the activation system messagechanges; obtain the first scheduling information of the activationsystem message according to the activation indication information andthe change indication tag; and read the activation system messageaccording to the first scheduling information.

According to the activation system information transmission method,apparatus, and device provided in the present invention, the basestation adds the activation indication information and the changeindication tag to the broadcast first system message; and afterreceiving the first system message, the UE selects, according to theactivation indication information and the change indication tag,different manners to obtain the first scheduling information of theactivation system message, and then reads the activation system messageat a location corresponding to the first scheduling information, so asto ensure that the UE needs to receive the scheduling information of theactivation system message only when the scheduling information changes,and prevent the UE from continuously remaining in a detection andreception state, thereby effectively reducing power consumption of theUE.

BRIEF DESCRIPTION OF DRAWINGS

To describe the technical solutions in the embodiments of the presentinvention more clearly, the following briefly describes the accompanyingdrawings required for describing the embodiments. Apparently, theaccompanying drawings in the following description show some embodimentsof the present invention, and persons of ordinary skill in the art maystill derive other drawings from these accompanying drawings withoutcreative efforts.

FIG. 1 is a schematic diagram of NB-IoT access control;

FIG. 2 is a schematic diagram of an application scenario of anactivation system information transmission method according to thepresent invention;

FIG. 3 is a flowchart of Embodiment 1 of an activation systeminformation transmission method according to the present invention;

FIG. 4 is a flowchart of Embodiment 2 of an activation systeminformation transmission method according to the present invention;

FIG. 5 is a flowchart of Embodiment 3 of an activation systeminformation transmission method according to the present invention;

FIG. 6 is a schematic diagram of NB-IoT access control according to thepresent invention;

FIG. 7 is a schematic structural diagram of Embodiment 1 of anactivation system information transmission apparatus according to thepresent invention;

FIG. 8 is a schematic structural diagram of Embodiment 2 of anactivation system information transmission apparatus according to thepresent invention;

FIG. 9 is a schematic structural diagram of Embodiment 3 of anactivation system information transmission apparatus according to thepresent invention;

FIG. 10 is a schematic structural diagram of Embodiment 4 of anactivation system information transmission apparatus according to thepresent invention;

FIG. 11 is a schematic structural diagram of Embodiment 5 of anactivation system information transmission apparatus according to thepresent invention;

FIG. 12 is a schematic structural diagram of Embodiment 1 of userequipment according to the present invention;

FIG. 13 is a schematic structural diagram of Embodiment 2 of userequipment according to the present invention; and

FIG. 14 is a schematic structural diagram of Embodiment 1 of a basestation according to the present invention.

DESCRIPTION OF EMBODIMENTS

To make the objectives, technical solutions, and advantages of theembodiments of the present invention clearer, the following clearlydescribes the technical solutions in the embodiments of the presentinvention with reference to the accompanying drawings in the embodimentsof the present invention. Apparently, the described embodiments are somebut not all of the embodiments of the present invention. All otherembodiments obtained by persons of ordinary skill in the art based onthe embodiments of the present invention without creative efforts shallfall within the protection scope of the present invention.

FIG. 2 is a schematic diagram of an application scenario of anactivation system information transmission method according to thepresent invention. A solution of the present invention may be applied toa wireless communications system with large network coverage and aplurality of connections, for example, an IoT communications system,shown in FIG. 2, having a terminal of low costs and low powerconsumption. The application scenario or the wireless communicationssystem may include a plurality of base stations, and a coverage area ofeach base station may include a plurality of user equipments, such as arefrigerator, a washing machine, a car, a television, a computer, awater meter, and an electricity meter. The user equipments implementcommunication by using a wireless network or a cellular network. Aservice of the IoT communications system generates a relatively smallpacket and is less sensitive to a delay, so that massive user terminaldevices can be deployed. The user terminal devices may include smartwater/electricity meters, smart home devices, smart wearable devices,and the like that are deployed in a large scale. A large quantity ofsuch devices may be connected to one base station. However, such anetwork deployment requires lower power consumption of the userequipment or the terminal device, so as to ensure an extra-long standbytime of the user equipment, thereby reducing labor costs. However, in anexisting control mechanism of service functions corresponding to someactivation system information, power consumption of user equipmentincreases because updated scheduling information in a SIB 1 needs to becontinuously read in a method for obtaining activation systeminformation. In view of this, a more energy-saving activation systeminformation transmission method is provided.

In the following technical solution, system messages are classified intotwo types according to a requirement for timeliness in which a changedsystem message needs to be obtained: One type is a conventional systemmessage. After this type of system message changes, UE does not need toimmediately obtain a changed system message, and can wait until aboundary of a change period to obtain the changed system message. Theother type is an activation system message that needs to be obtained intime. After this type of system message changes, the UE can obtain anupdated system message at any time, and no specific change period isused.

FIG. 3 is a flowchart of Embodiment 1 of an activation systeminformation transmission method according to the present invention. Asshown in FIG. 3, the solution is executed by UE on the basis of theapplication scenario shown in FIG. 2. The activation system informationtransmission method includes the following specific steps.

S101. The UE receives a first system message sent by a base station,where the first system message includes activation indicationinformation and a change indication tag.

In this embodiment, the user equipment, that is, a terminal device on auser side, receives the first system message broadcast by the basestation. The first system message is a system message necessary fortransmission. The activation indication information is used to indicatewhether a function indicated in an activation system message isactivated, and the change indication tag is used to indicate whetherscheduling information of the activation system message changes.

S102. The UE obtains first scheduling information of an activationsystem message according to the activation indication information andthe change indication tag.

In this step, the UE does not receive all messages broadcast by the basestation. In particular, for the scheduling information of the activationsystem message, the UE performs determining according to the activationindication information and the change indication tag. If the schedulinginformation of the activation system message is locally stored, and thechange indication tag indicates that the scheduling information of theactivation system message does not change, the UE directly uses thelocal scheduling information as the first scheduling information; or ifthe scheduling information of the activation system message is notlocally stored, the UE receives the scheduling information from themessages broadcast by the base station.

S103. The UE reads the activation system message according to the firstscheduling information.

In this step, after obtaining the first scheduling information, the UEneeds to receive the activation system message on a resource (orreferred to as a location) indicated in the first schedulinginformation.

The terminal uses a corresponding activation function according to afunction supported in the activation system message.

Access control is used as an example. After reading a message in whichan access control message is located, the terminal determines, accordingto an access control parameter included in the message, whether toaccess a network.

According to the activation system information transmission methodprovided in this embodiment, the base station adds the activationindication information and the change indication tag to the broadcastfirst system message; and after receiving the first system message, theUE selects, according to the activation indication information and thechange indication tag, different manners to obtain the first schedulinginformation of the activation system message, and then reads theactivation system message at a location corresponding to the firstscheduling information, so as to ensure that the UE needs to receive thescheduling information of the activation system message only when thescheduling information changes, and prevent the UE from continuouslyremaining in a detection and reception state, thereby effectivelyreducing power consumption of the UE.

On the basis of the foregoing embodiment, the following describes indetail a specific implementation in which the UE obtains the firstscheduling information.

FIG. 4 is a flowchart of Embodiment 2 of an activation systeminformation transmission method according to the present invention. Asshown in FIG. 4, on the basis of the foregoing embodiment, a specificimplementation step in which the UE obtains the first schedulinginformation of the activation system message according to the activationindication information and the change indication tag in S102 is asfollows:

S201. The UE detects whether scheduling information of the activationsystem message is locally stored.

In this step, after receiving the first system message, the UE firstneeds to detect whether scheduling information of one or morecorresponding activation system messages is locally stored, that is,each time obtaining the scheduling information, the UE needs to storethe scheduling information.

Optionally, if the UE detects that the scheduling information of theactivation system message is not locally stored, the UE receives asecond system message sent by the base station, where the second systemmessage includes the first scheduling information of the activationsystem message and scheduling information of a conventional systemmessage. This means: After the UE detects that the schedulinginformation of the activation system message is not locally stored, theUE needs to obtain the scheduling information from the second systemmessage broadcast by the base station, that is, read the schedulinginformation from a scheduling information block.

S202. If the scheduling information of the activation system message islocally stored, the UE determines, according to the activationindication information, whether a function indicated in the activationsystem message is activated.

In this step, if the UE stores the scheduling information of theactivation system message, the UE needs to detect whether the functionindicated in the activation system information is activated; and if thefunction indicated in the activation system information is activated,the UE needs to obtain the scheduling information.

S203. If the function indicated in the activation system message isactivated, the UE determines, according to the change indication tag,whether the scheduling information of the activation system messagechanges.

In this step, if the UE determines that the function indicated in theactivation system message is activated, and has determined, according tothe foregoing step, that the scheduling information of the activationsystem message is locally stored, the UE needs to further determinewhether the scheduling information of the activation system messagechanges. In a specific implementation, the change indication tag may bea value tag, that is, a value is used to indicate a change of thescheduling information. A specific manner of determining whether thescheduling information changes is: If the UE detects that the value tagchanges, the UE determines that the scheduling information of theactivation system message changes; or if the UE detects that the valuetag does not change, the UE determines that the scheduling informationof the activation system information does not change. That is, the UEdetects whether a current value tag is the same as a value tag obtainedlast time; and if the current value tag is the same as the value tagobtained last time, the UE determines that the scheduling information ofthe activation system message does not change, or if the current valuetag is different from the value tag obtained last time, the UEdetermines that the scheduling information of the activation systemmessage changes.

The foregoing description means: If the change indication tag does notchange, the UE determines that the scheduling information of theactivation function does not change; or if the change indication tagchanges, the UE determines that the scheduling information of theactivation function changes.

Optionally, the determining that the scheduling information of theactivation system message does not change includes at least thefollowing two cases. In a first case, if the change indication tagindicates that the scheduling information of the activation systemmessage does not change, and the second system message does not includethe scheduling information of the activation system message, the UEdetermines that the scheduling information of the activation functiondoes not change. In a second case, if the change indication tagindicates that the scheduling information of the activation systemmessage does not change, and the second system message includes thescheduling information of the activation system message, the UEdetermines that the scheduling information of the activation functiondoes not change.

Optionally, in the foregoing process, if the scheduling information ofthe activation system message is not locally stored, and the functionindicated in the activation system message is activated, the UE receivesa second system message sent by the base station, where the secondsystem message includes the first scheduling information of theactivation system message and scheduling information of a conventionalsystem message.

That is, in the process, if the UE detects that the schedulinginformation of the activation system message is not locally stored, andthe activation indication information indicates that the functionindicated in the activation system message is activated, the UE needs toread the scheduling information of the corresponding activation systemmessage from the second system message broadcast by the base station anduse the scheduling information as the first scheduling information, soas to obtain the scheduling information of the corresponding activationsystem message.

S204. If the scheduling information of the activation system messagedoes not change, use the locally stored scheduling information of theactivation system message as the first scheduling information.

This step means: When the UE determines that the activation systemmessage is locally stored, the function indicated in the activationsystem message is activated, and the scheduling information of theactivation system message does not change, the UE does not need to readthe second system message broadcast by the base station, and directlyuses the locally stored scheduling information as the first schedulinginformation.

Optionally, if the scheduling information of the activation systemmessage changes, the UE receives a second system message sent by thebase station, where the second system message includes the firstscheduling information of the activation system message and schedulinginformation of a conventional system message.

However, if the UE determines, by using the value tag, that thescheduling information of the activation system message changes, the UEneeds to obtain the first scheduling information by means of readingfrom the second system message.

Further, after obtaining the first scheduling information, the UEupdates the locally stored scheduling information of the activationsystem message to the first scheduling information. That is, if thescheduling information of the activation system message changes, the UEdeletes the locally stored scheduling information and updates thescheduling information to new scheduling information; or if thescheduling information of the activation system message does not change,the UE does not need to update the scheduling information. In addition,if the scheduling information is not locally stored, the UE needs tostore the first scheduling information after obtaining the firstscheduling information.

In the foregoing process, to monitor a change of the value tag, the UEneeds to locally store a corresponding value tag after each time ofprocessing is completed, so as to make a comparison in a next time ofdetection.

Optionally, the activation system message includes an access controlmessage.

According to the activation system information transmission methodprovided in this embodiment, the UE determines, according to theactivation indication information and the change indication tag in thefirst system message, whether the function in the activation systeminformation is activated, and determines whether the schedulinginformation of the activation system information changes; and when thescheduling information of the activation system information is locallystored, the corresponding function is activated, and the schedulinginformation does not change, the UE does not need to receive thescheduling information from the base station, but uses the locallystored scheduling information as the first scheduling information of theactivation system information, and reads the corresponding activationsystem information according to the first scheduling information, so asto complete a subsequent service, and reduce duration for which theterminal is in a detection and reception state, thereby reducing powerconsumption of the UE.

FIG. 5 is a flowchart of Embodiment 3 of an activation systeminformation transmission method according to the present invention. Asshown in FIG. 5, the solution is executed by a base station in thescenario shown in FIG. 2. A specific implementation step of theactivation system information transmission method is as follows:

S301. The base station generates a first system message, where the firstsystem message includes activation indication information and a changeindication tag.

In this embodiment, the activation indication information is used toindicate whether a function indicated in an activation system message isactivated, and the change indication tag is used to indicate whetherscheduling information of the activation system message changes.

S302. The base station broadcasts the first system message, so that userequipment UE obtains first scheduling information of an activationsystem message according to the activation indication information andthe change indication tag, and reads the activation system messageaccording to the first scheduling information.

In this embodiment, the base station adds the change indication tag tothe first system message, so that the UE determines whether thescheduling information of the activation system information changes. Ifthe scheduling information of the activation system information does notchange, the function in the activation system message is activated, andthe UE stores previous scheduling information of the activation systemmessage, the UE may directly use the scheduling information as the firstscheduling information to read the activation system message, and the UEdoes not need to read a second system message.

For a base station side, the second system message needs to be generatedregardless of whether the function in the foregoing activation systemmessage is activated.

Further, the base station generates the second system message, where thesecond system message includes the scheduling information correspondingto the activation system message and scheduling information of aconventional system message.

The base station broadcasts the second system message and the activationsystem message if the activation indication information indicates thatthe function indicated in the activation system message is activated; or

the base station broadcasts the second system message if the activationindication information indicates that the function indicated in theactivation system message is not activated.

The broadcasting the second system message means: If the function in theactivation system message is activated, the base station needs tobroadcast the second system message and the activation system message;or if the function in the activation system message is not activated,the base station only needs to broadcast the second system message, anddoes not need to broadcast the activation system message.

In a specific implementation, the change indication tag is a value tag.

That the base station generates a first system message includes:

changing, by the base station, the value tag when it is determined thatthe sent scheduling information of the activation system messagechanges; or

changing, by the base station, the value tag when determining that thebase station changes from a state in which the base station does notsend the scheduling information of the activation system message to astate in which the base station sends the scheduling information of theactivation system information, or the base station changes from a statein which the base station sends the scheduling information of theactivation system message to a state in which the base station does notsend the scheduling information of the activation system information; or

skipping, by the base station, changing the value tag when determiningthat the base station changes from a state in which the base stationdoes not send the scheduling information of the activation systemmessage to a state in which the base station sends the schedulinginformation of the activation system information, or the base stationchanges from a state in which the base station sends the schedulinginformation of the activation system message to a state in which thebase station does not send the scheduling information of the activationsystem information.

The solution for changing the value tag in the first system message,that is, the solution of changing the change indication tag means: Ifthe base station determines that current scheduling information of theactivation system message is different from previous schedulinginformation of the activation system message, the base station changesthe value tag, so that the UE can determine that the schedulinginformation has changed after receiving a changed value tag. If the basestation determines that the scheduling information of the activationsystem message is not sent last time, but the scheduling information ofthe activation system message is sent in this time of scheduling, or thescheduling information of the activation system message is sent in alast time of scheduling, but the scheduling information of theactivation system message is not sent this time, that is, when abehavior of sending or not sending the scheduling information changes,the base station may change the value tag, or may not change the valuetag.

That is, if the base station sends the scheduling information of theactivation system message by using the second system message, and if thescheduling information changes, the base station changes the changeindication tag; or if whether the base station adds the schedulinginformation of the activation system message to the second systemmessage changes, the base station changes the change indication tag; orif whether the base station adds the scheduling information of theactivation system message to the second system message changes, the basestation does not change the change indication tag. That whether the basestation adds the scheduling information of the activation system messageto the second system message changes specifically includes: That thesecond system message of the base station previously includes thescheduling information of the activation system message changes to thatthe second system message of the base station currently does not includethe scheduling information of the activation system message; or

that the second system message of the base station previously does notinclude the scheduling information of the activation system messagechanges to that the second system message of the base station currentlyincludes the scheduling information of the activation system message.

Optionally, the activation system message includes an access controlmessage.

Based on the application scenario shown in FIG. 2, for an NB-IoT system,the following uses an access control message as an example to describein detail the activation system information transmission method(equivalent to an access control method in this solution) in the presentinvention. Network elements deployed in the solution are a base stationand user equipment, and a main idea of the solution is as follows:

1. A bit (that is, the foregoing activation indication information) isintroduced in a master system message (Master information Block, MIB) toindicate whether an NB-IoT access control mechanism is enabled. Inaddition, the MIB further includes a value tag (that is, the changeindication tag) that is used to indicate change indications of aplurality of SIBs that affect a change of the value tag other than theMIB.

2. Regardless of whether an NB-IoT access control function is enabled,the base station adds scheduling information of an SIB_AC to schedulinginformation of a SIB 1. A change of the scheduling information affects avalue of the value tag in the MIB, that is, the base station alwaysschedules SIB_AC system message.

Specifically, when the access control function is deactivated (AC=OFF),the SIB_AC system message is not sent, and a radio resourcecorresponding to the SIB_AC system message may be used for other datatransmission. When the access control function is activated (AC=ON), theSIB_AC system message is sent.

3. For the UE, the UE determines whether to read scheduling informationof the SIB_AC system message and the SIB_AC system message according tothe value of the value tag in the MIB and the bit that is in the MIB andthat indicates whether access control is activated.

Optionally, another method is: Similar to that in existing LTE,broadcasting the SIB_AC or not makes the scheduling information of theSIB 1 change. However, the value tag in the MIB may not change. An eNBdetermines, according to a broadcast period, an occupied resource, andthe like of the SIB_AC, whether the value tag needs to be updated. Ifnone of the information changes, and only the SIB_AC broadcasting startsand stops, the eNB may not change the value tag.

In the solution of the present invention, system messages are classifiedinto two types according to a requirement for timeliness in which achanged system message needs to be obtained: One type is a conventionalsystem message. After this type of system message changes, UE does notneed to immediately obtain a changed system message, and can wait untila boundary of a change period to obtain the changed system message. Theother type is an activation system message that needs to be obtained intime. After this type of system message changes, the UE can obtain anupdated system message at any time, and no specific change period isused.

Whether the conventional system message changes may be indicated by avalue tag. Values of value tags are compared to determine whether thesystem message changes. Each value tag represents a version of theconventional system message. When the value tag changes, it means thatsome conventional system messages change. The value tag is used toindicate a change status of a system information block after a systemmessage in which the value tag is located. For example, if the value tagis located in a MIB, the value tag is used to indicate changes of allconventional SIBs other than the MIB. The SIBs include a SIB 1, a SIB 2,SIBs 3, 4, and 5, and the like (a SIB that carries cell access controlinformation and scheduling information of another system informationblock is represented as the SIB 1, a SIB for radio resourceconfiguration is represented as the SIB 2, a SIB newly added to a cellfor access control is represented as an SIB_AC, and SIBs for cellselection and re-selection configuration are represented as the SIBs 3,4, and 5).

A system message that needs to be obtained in time is not enumerated,and further includes another possible system message that needs to beobtained in time, for example, an SIB_AC in which an access controlparameter is located. After the access control parameter changes, the UEcan obtain a changed access control parameter in time without waitinguntil a boundary of a change period to obtain the changed access controlparameter.

In addition, for reducing power consumption of the terminal, anindication is introduced in the MIB to indicate whether an accesscontrol function is enabled, or whether another system information blockthat needs to be obtained in time is enabled. An access controlinformation block is used as an example herein to describe a method forsending and obtaining scheduling information of the system informationblock that needs to be obtained in time. A method for obtaining ascheduling mechanism of the another system information block that needsto be obtained in time is the same as the method for obtainingscheduling information of the access control information block, and isnot described.

With reference to the essence of the solution described above, FIG. 6 isa schematic diagram of NB-IoT access control according to the presentinvention. As shown in FIG. 6, a base station first sends an accesscontrol enabling indication (which is equivalent to activationindication information and is used in the solution to indicate whetheraccess control is activated) by using a MIB.

The base station schedules access control, and sends schedulinginformation of an SIB_AC (an access control information block) by usingscheduling information of a SIB 1.

On a UE side, when UE reads a system message, the UE first reads a valuetag (equivalent to the foregoing change indication tag) and the accesscontrol enabling indication in the MIB. If the access control enablingindication indicates that an access control function is enabled, the UEdetects whether a SIB 1 that includes scheduling information of anaccess control parameter is locally stored.

If the UE detects that the scheduling information of the access controlparameter is not locally stored, the UE reads the SIB 1 sent by the basestation to obtain the scheduling information of the access controlparameter SIB_AC, and then obtains an SIB_AC in which the access controlparameter is located and that is sent at a resource location indicatedin the scheduling information. That is, when the scheduling informationof the SIB_AC is not locally stored, the UE needs to read the schedulinginformation that is of the SIB_AC and that is in the SIB 1 broadcast bythe base station, and receive, on a corresponding resource, the SIB_ACin which the access control parameter is located.

If the UE detects that the scheduling information of the access controlparameter is locally stored, the UE compares a current value tag with apreviously stored value tag. If values of the value tags are the same,the UE uses previously stored scheduling information of the accesscontrol parameter SIB_AC to read an SIB_AC in which the access controlparameter is located without reading the SIB 1 in which the schedulinginformation of the access control parameter is located and that isbroadcast by the base station. If values of the value tags aredifferent, the UE reads scheduling information that is of the accesscontrol parameter SIB_AC and that is updated in the SIB 1, and thenlocally stores or updates the scheduling information of the accesscontrol parameter, and reads an access control parameter SIB_ACtransmitted at a resource location indicated in the schedulinginformation.

In the foregoing solution, when the UE reads the system message, the UEfirst reads the value tag and the access control enabling indication inthe MIB. If the access control enabling indication indicates that theaccess control function is disabled, that is, the access controlfunction is not activated, the UE may read the scheduling information ofthe access control parameter in the SIB 1 and store the schedulinginformation in the UE, or may not directly read the schedulinginformation in the SIB 1.

In the foregoing solution, it can be ensured that the user equipmentneeds to obtain the scheduling information of the access controlparameter only when the scheduling information related to the accesscontrol parameter changes and the access control function is enabled, soas to reduce power consumption of the UE. Compared with the prior art inwhich the user equipment needs to always serve the SIB 1 to obtain thescheduling information of the access control parameter, in the solution,the user equipment does not need to always read, when an enabling statusof the access control function changes, the SIB 1 to obtain the updatedscheduling parameter corresponding to the access control parameter, soas to reduce the power consumption.

In addition, on the basis of the foregoing solution, anotherimplementation is provided.

When the UE reads a system message, the UE first reads a value tag andan access control enabling indication in a MIB. If the access controlenabling indication indicates that an access control function isenabled, the UE detects whether a SIB 1 that includes schedulinginformation of an access control parameter is stored. If the UE does notlocally store the scheduling information of the access controlparameter, the UE reads the SIB 1 to obtain the scheduling informationof the access control parameter, and then obtains a SIB_AC in which theaccess control parameter is located and that is at a resource locationindicated in the scheduling information. If the UE stores the schedulinginformation, the UE compares a current value tag with a previouslystored value tag. If values of the value tags are the same, the UE usespreviously stored scheduling information corresponding to the accesscontrol parameter to read a SIB_AC in which the access parameter islocated without reading the SIB 1 in which the access control parameteris located. If values of the value tags are different, the UE readsscheduling information that is of the access control parameter and thatis updated in the SIB 1, and then updates the scheduling information tothe updated scheduling information, and reads the SIB_AC in which theaccess control parameter is located.

When the UE reads the system message, the UE first reads the value tagand the access control enabling indication in the MIB. If the accesscontrol enabling indication indicates that the access control functionis disabled, the UE stores the scheduling information of the accesscontrol parameter in the SIB 1.

Different from the foregoing solution, if the SIB 1 changes for anotherreason, the UE may re-read the SIB 1 according to the value tag.However, if a new SIB 1 does not include the scheduling information ofthe SIB_AC, it is considered that the original scheduling information ofthe SIB_AC is still retained. That is, when the new SIB 1 does notinclude the scheduling information of the access control parameter, thelocally stored scheduling information is still used to read the accesscontrol parameter at a corresponding location.

Optionally, there is another possible processing method. When the UEdetects that the scheduling information of the SIB_AC is not locallystored, the UE reads the SIB 1 to obtain the scheduling information ofthe SIB_AC later for storage. In this case, regardless of whether theaccess control function is activated, the UE may read the schedulinginformation that is of the SIB_AC and that is in the SIB 1 for storage,so that in a subsequent process, if it is determined that the schedulinginformation does not change, the UE may directly use the locally storedscheduling information without reading the SIB 1 again, so as to saveenergy.

FIG. 7 is a schematic structural diagram of Embodiment 1 of anactivation system information transmission apparatus according to thepresent invention. As shown in FIG. 7, the activation system informationtransmission apparatus 10 includes:

a first receiving module 11, configured to receive a first systemmessage sent by a base station, where the first system message includesactivation indication information and a change indication tag, theactivation indication information is used to indicate whether a functionindicated in an activation system message is activated, and the changeindication tag is used to indicate whether scheduling information of theactivation system message changes;

a processing module 12, configured to obtain first schedulinginformation of the activation system message according to the activationindication information and the change indication tag; and

a second receiving module 13, configured to read the activation systemmessage according to the first scheduling information.

The activation system information transmission apparatus provided inthis embodiment is configured to perform the technical solution in themethod embodiment shown in FIG. 3 or FIG. 4. An implementation principleand a technical effect of the apparatus are similar to those of themethod embodiment shown in FIG. 3 or FIG. 4. The apparatus receives theactivation indication information and the change indication tag that areadded by the base station to the broadcast first system message; andafter receiving the first system message, the apparatus selects,according to the activation indication information and the changeindication tag, different manners to obtain the first schedulinginformation of the activation system message, and then reads theactivation system message at a location corresponding to the firstscheduling information, so as to ensure that the transmission apparatusneeds to receive the scheduling information of the activation systemmessage only when the scheduling information changes, and prevent thetransmission apparatus from continuously remaining in a detection andreception state, thereby effectively reducing power consumption.

FIG. 8 is a schematic structural diagram of Embodiment 2 of anactivation system information transmission apparatus according to thepresent invention. As shown in FIG. 8, on the basis of the foregoingembodiment, the processing module 12 includes:

a detection submodule 121, configured to detect whether the schedulinginformation of the activation system message is locally stored;

a first determining submodule 122, configured to: if the detectionsubmodule detects that the scheduling information of the activationsystem message is locally stored, determine, according to the activationindication information, whether the function indicated in the activationsystem message is activated;

a second determining submodule 123, configured to: if the firstdetermining submodule determines that the function indicated in theactivation system message is activated, determine, according to thechange indication tag, whether the scheduling information of theactivation system message changes; and

a processing submodule 124, configured to: if the second determiningsubmodule determines that the scheduling information of the activationsystem message does not change, use the locally stored schedulinginformation of the activation system message as the first schedulinginformation.

Optionally, if the detection submodule 121 detects that the schedulinginformation of the activation system message is not locally stored, thesecond receiving module 13 is further configured to receive a secondsystem message sent by the base station, where the second system messageincludes the first scheduling information of the activation systemmessage and scheduling information of a conventional system message.

Optionally, if the detection submodule 121 detects that the schedulinginformation of the activation system message is not locally stored, andthe first determining submodule 122 determines that the functionindicated in the activation system message is activated, the secondreceiving module 13 is further configured to receive a second systemmessage sent by the base station, where the second system messageincludes the first scheduling information of the activation systemmessage and scheduling information of a conventional system message.

Optionally, if the second determining submodule 123 determines that thescheduling information of the activation system message changes, thesecond receiving module 13 is further configured to receive a secondsystem message sent by the base station, where the second system messageincludes the first scheduling information of the activation systemmessage and scheduling information of a conventional system message.

FIG. 9 is a schematic structural diagram of Embodiment 3 of anactivation system information transmission apparatus according to thepresent invention. As shown in FIG. 9, on the basis of any one of theforegoing embodiments, the activation system information transmissionapparatus 10 further includes:

a storage module 14, configured to update the locally stored schedulinginformation of the activation system message to the first schedulinginformation.

Optionally, if the change indication tag is a value tag, the seconddetermining submodule 123 is specifically configured to: if the UEdetects that the value tag changes, determine that the schedulinginformation of the activation system message changes; or if the UEdetects that the value tag does not change, determine that thescheduling information of the activation system information does notchange.

Further, the activation system message read by the second receivingmodule 13 includes an access control message.

The activation system information transmission apparatus provided in theembodiment shown in FIG. 8 or FIG. 9 is configured to perform thetechnical solutions of the UEs in the method embodiments shown in FIG. 2to FIG. 6. An implementation principle and a technical effect of theapparatus are similar to those of the UEs, and details are not describedherein again.

FIG. 10 is a schematic structural diagram of Embodiment 4 of anactivation system information transmission apparatus according to thepresent invention. As shown in FIG. 10, the activation systeminformation transmission apparatus 20 includes:

a first processing module 21, configured to generate a first systemmessage, where the first system message includes activation indicationinformation and a change indication tag, the activation indicationinformation is used to indicate whether a function indicated in anactivation system message is activated, and the change indication tag isused to indicate whether scheduling information of the activation systemmessage changes; and

a first sending module 22, configured to broadcast the first systemmessage, so that user equipment UE obtains first scheduling informationof the activation system message according to the activation indicationinformation and the change indication tag, and reads the activationsystem message according to the first scheduling information.

The activation system information transmission apparatus provided inthis embodiment is configured to perform the technical solutions of thebase stations in the method embodiments shown in FIG. 2 to FIG. 6. Animplementation principle and a technical effect of the apparatus aresimilar to those of the base stations, and details are not describedherein again.

FIG. 11 is a schematic structural diagram of Embodiment 5 of anactivation system information transmission apparatus according to thepresent invention. As shown in FIG. 11, the activation systeminformation transmission apparatus 20 further includes:

a second processing module 23, configured to generate a second systemmessage, where the second system message includes the schedulinginformation corresponding to the activation system message andscheduling information of a conventional system message; and

a second sending module 24, configured to broadcast the second systemmessage and the activation system message if the activation indicationinformation indicates that the function indicated in the activationsystem message is activated, where

the second sending module is further configured to broadcast the secondsystem message if the activation indication information indicates thatthe function indicated in the activation system message is notactivated.

Optionally, if the change indication tag is a value tag, the firstprocessing module 21 is specifically configured to:

change the value tag when it is determined that the sent schedulinginformation of the activation system message changes; or

change the value tag when it is determined that the access controlapparatus changes from a state in which the access control apparatusdoes not send the scheduling information of the activation systemmessage to a state in which the access control apparatus sends thescheduling information of the activation system information, or theaccess control apparatus changes from a state in which the accesscontrol apparatus sends the scheduling information of the activationsystem message to a state in which the access control apparatus does notsend the scheduling information of the activation system information; or

skip changing the value tag when it is determined that the accesscontrol apparatus changes from a state in which the access controlapparatus does not send the scheduling information of the activationsystem message to a state in which the access control apparatus sendsthe scheduling information of the activation system information, or theaccess control apparatus changes from a state in which the accesscontrol apparatus sends the scheduling information of the activationsystem message to a state in which the access control apparatus does notsend the scheduling information of the activation system information.

The activation system information transmission apparatus provided inthis embodiment is configured to perform the technical solutions of thebase stations in the method embodiments shown in FIG. 2 to FIG. 6. Animplementation principle and a technical effect of the apparatus aresimilar to those of the base stations, and details are not describedherein again.

FIG. 12 is a schematic structural diagram of Embodiment 1 of userequipment according to the present invention. As shown in FIG. 12, theuser equipment 30 includes a memory 31 that stores a programinstruction, a processor 32 configured to control execution of theprogram instruction, and a receiver 33.

The receiver 33 is configured to receive a first system message sent bya base station, where the first system message includes activationindication information and a change indication tag, the activationindication information is used to indicate whether a function indicatedin an activation system message is activated, and the change indicationtag is used to indicate whether scheduling information of the activationsystem message changes.

The processor 32 is configured to obtain first scheduling information ofthe activation system message according to the activation indicationinformation and the change indication tag.

The receiver 33 is further configured to read the activation systemmessage according to the first scheduling information.

Specifically, the processor 32 of the user equipment 30 is specificallyconfigured to:

detect whether the scheduling information of the activation systemmessage is locally stored;

if the scheduling information of the activation system message islocally stored, determine, according to the activation indicationinformation, whether the function indicated in the activation systemmessage is activated;

if the function indicated in the activation system message is activated,determine, according to the change indication tag, whether thescheduling information of the activation system message changes; and

if the scheduling information of the activation system message does notchange, use the locally stored scheduling information of the activationsystem message as the first scheduling information.

Optionally, if the scheduling information of the activation systemmessage is not locally stored, the receiver 33 is further configured toreceive a second system message sent by the base station, where thesecond system message includes the first scheduling information of theactivation system message and scheduling information of a conventionalsystem message.

Optionally, if the scheduling information of the activation systemmessage is not locally stored, and the function indicated in theactivation system message is activated, the receiver 33 is furtherconfigured to receive a second system message sent by the base station,where the second system message includes the first schedulinginformation of the activation system message and scheduling informationof a conventional system message.

Optionally, if the scheduling information of the activation systemmessage changes, the receiver 33 is further configured to receive asecond system message sent by the base station, where the second systemmessage includes the first scheduling information of the activationsystem message and scheduling information of a conventional systemmessage.

Further, the processor 32 is configured to update the schedulinginformation that is of the activation system message and that is storedin the memory 31 to the first scheduling information.

Optionally, if the change indication tag is a value tag, the processor32 is further configured to:

if it is detected that the value tag changes, determine that thescheduling information of the activation system message changes; or ifit is detected that the value tag does not change, determine that thescheduling information of the activation system information does notchange.

Optionally, the activation system message includes an access controlmessage.

The user equipment provided in this embodiment is configured to performthe technical solutions of the UEs in the method embodiments shown inFIG. 2 to FIG. 6. An implementation principle and a technical effect ofthe user equipment are similar to those of the UEs, and details are notdescribed herein again.

FIG. 13 is a schematic structural diagram of Embodiment 2 of userequipment according to the present invention. As shown in FIG. 13, theuser equipment 600 includes at least one processor 601, at least onenetwork interface 604 or another user interface 603, a memory 605, atleast one communications bus 602, and a transceiver 606. Thecommunications bus 602 is configured to implement connection andcommunication between these components. Optionally, the terminal device600 includes the user interface 603. The user interface 603 includes adisplay (such as a touchscreen, an LCD, a CRT, a holographic imagingdevice, or a projector), a keyboard, or a click device (such as a mouse,a trackball, a touchpad, or a touchscreen).

The memory 605 may include a read-only memory and a random accessmemory, and provide an instruction and data for the processor 601. Apart of the memory 605 may be specifically implemented as: a read-onlymemory (ROM), a RAM, a flash memory, a hard disk, a solid state disk, amagnetic tape, a floppy disk, an optical disc, and any combinationthereof.

In this solution, the transceiver 606 may specifically include atransmitter circuit and a receiver circuit, and a carrier thereof, so asto allow data transmission and reception between the user equipment 600and a base station or a wireless network router. The transmitter circuitand the receiver circuit may be coupled to an antenna forimplementation.

In some implementations, the memory 605 stores the following elements:an executable module or a data structure, or a subset thereof, or anextended set thereof: an operating system 6051, including various systemprograms, such as a framework layer, a kernel library layer, and adriver layer, and configured to implement various basic services andprocess a hardware-based task; and

an application program module 6052, including various applicationprograms, such as a desktop (launcher), a media player, and a browserthat are shown in FIG. 1, and configured to implement variousapplication services.

In this embodiment of the present invention, the processor 601 isconfigured to control execution of the solution of the UE in the methodembodiment by invoking a program or an instruction stored in the memory605. Specifically, the processor 601 is configured to control thetransceiver 606 to receive a first system message sent by the basestation, where the first system message includes activation indicationinformation and a change indication tag, the activation indicationinformation is used to indicate whether a function indicated in anactivation system message is activated, and the change indication tag isused to indicate whether scheduling information of the activation systemmessage changes.

The processor 601 is further configured to control execution of theinstruction in the memory 605 to: obtain first scheduling information ofthe activation system message according to the activation indicationinformation and the change indication tag, and read the activationsystem message according to the first scheduling information.

FIG. 14 is a schematic structural diagram of Embodiment 1 of a basestation according to the present invention. As shown in FIG. 14, thebase station 40 includes a memory 41 that stores a program instruction,a processor 42 configured to control execution of the programinstruction, and a transmitter 43.

The processor 42 is configured to generate a first system message, wherethe first system message includes activation indication information anda change indication tag, the activation indication information is usedto indicate whether a function indicated in an activation system messageis activated, and the change indication tag is used to indicate whetherscheduling information of the activation system message changes.

The transmitter 43 is configured to broadcast the first system message,so that user equipment UE obtains first scheduling information of theactivation system message according to the activation indicationinformation and the change indication tag, and reads the activationsystem message according to the first scheduling information.

Optionally, the processor 42 is further configured to generate a secondsystem message, where the second system message includes the schedulinginformation corresponding to the activation system message andscheduling information of a conventional system message.

The transmitter 43 is further configured to broadcast the second systemmessage and the activation system message if the activation indicationinformation indicates that the function indicated in the activationsystem message is activated; or

the transmitter 43 is further configured to broadcast the second systemmessage if the activation indication information indicates that thefunction indicated in the activation system message is not activated.

Optionally, the change indication tag is a value tag.

The processor 42 is specifically configured to:

change the value tag when it is determined that the sent schedulinginformation of the activation system message changes; or

change the value tag when it is determined that the base station changesfrom a state in which the base station does not send the schedulinginformation of the activation system message to a state in which thebase station sends the scheduling information of the activation systeminformation, or the base station changes from a state in which the basestation sends the scheduling information of the activation systemmessage to a state in which the base station does not send thescheduling information of the activation system information; or

skip changing the value tag when it is determined that the base stationchanges from a state in which the base station does not send thescheduling information of the activation system message to a state inwhich the base station sends the scheduling information of theactivation system information, or the base station changes from a statein which the base station sends the scheduling information of theactivation system message to a state in which the base station does notsend the scheduling information of the activation system information.

The activation system message includes an access control message.

The base station provided in this embodiment is configured to performthe technical solutions of the base stations in the method embodimentsshown in FIG. 2 to FIG. 6. An implementation principle and a technicaleffect of the base station are similar to those of the base stations,and details are not described herein again.

In the foregoing embodiment of the user equipment or the base station,it should be understood that the processor may be a central processingunit (CPU), or may be another general-purpose processor, a digitalsignal processor (DSP), an application-specific integrated circuit (ASICort), or the like. The general-purpose processor may be amicroprocessor, or the processor may be any conventional processor orthe like. The steps in the method disclosed with reference to theembodiments of the present invention may be directly performed by ahardware processor, or may be performed by using a combination ofhardware in a processor and a software module.

Persons of ordinary skill in the art may understand that all or some ofthe steps of the method embodiments may be implemented by a programinstructing relevant hardware. The program may be stored in acomputer-readable storage medium. When the program is executed, thesteps of the methods in the embodiments are performed. The storagemedium includes: a read-only memory (ROM), a RAM, a flash memory, a harddisk, a solid state disk, a magnetic tape, a floppy disk, an opticaldisc, and any combination thereof.

Finally, it should be noted that the foregoing embodiments are merelyintended for describing the technical solutions of the presentinvention, but not for limiting the present invention. Although thepresent invention is described in detail with reference to the foregoingembodiments, persons of ordinary skill in the art should understand thatthey may still make modifications to the technical solutions describedin the foregoing embodiments or make equivalent replacements to some orall technical features thereof, without departing from the scope of thetechnical solutions of the embodiments of the present invention.

The invention claimed is:
 1. An activation system informationtransmission method, comprising: receiving, by user equipment (UE), afirst system message from a base station, wherein the first systemmessage comprises activation indication information and a changeindication tag, the activation indication information indicates whethera function indicated in an activation system message is activated, andthe change indication tag is a value tag; detecting, by the UE, whetherthe scheduling information of the activation system message is locallystored; determining, by the UE according to the activation indicationinformation, whether the function indicated in the activation systemmessage is activated in response to the scheduling information of theactivation system message being locally stored; determining, by the UEaccording to the value tag, that the scheduling information of theactivation system message does not change in response to the functionindicated in the activation system message being activated; using, bythe UE, the locally stored scheduling information of the activationsystem message as first scheduling information in response to thescheduling information of the activation system message not changing;and reading, by the UE, the activation system message according to thefirst scheduling information.
 2. The method according to claim 1,wherein the reading, by the UE, the activation system message accordingto the first scheduling information comprises: obtaining, by the UE, anupdated system message according to the first scheduling information. 3.The method according to claim 1, wherein the change indication tagfurther indicates a change of a second system message, wherein thesecond system message comprises the scheduling information of theactivation system message.
 4. The method according to claim 1, whereinthe change indication tag in the first system message does not indicatea change of the activation system message.
 5. The method according toclaim 1, wherein the method further comprises: if the schedulinginformation of the activation system message is not locally stored,receiving, by the UE, a second system message sent by the base station,wherein the second system message comprises the first schedulinginformation of the activation system message and scheduling informationof a non-activation system message.
 6. The method according to claim 5,wherein the method further comprises: updating, by the UE, the locallystored scheduling information of the activation system message to thefirst scheduling information.
 7. The method according to claim 1,wherein the method further comprises: if the scheduling information ofthe activation system message is not locally stored, and the functionindicated in the activation system message is activated, receiving, bythe UE, a second system message sent by the base station, wherein thesecond system message comprises the first scheduling information of theactivation system message and scheduling information of a conventionalsystem message.
 8. The method according to claim 1, wherein the methodfurther comprises: if the scheduling information of the activationsystem message changes, receiving, by the UE, a second system messagesent by the base station, wherein the second system message comprisesthe first scheduling information of the activation system message andscheduling information of a conventional system message.
 9. The methodaccording to claim 1, wherein the determining, by the UE according tothe value tag, that the scheduling information of the activation systemmessage does not change comprises: if the UE detects that the value tagdoes not change, determining that the scheduling information of theactivation system message does not change.
 10. The method according toclaim 1, wherein the activation system message comprises access controlinformation.
 11. The method according to claim 10, further including:determining, by the UE, according to the access control message, whetherto access a network.
 12. An apparatus, comprising a memory that stores aprogram instruction, a processor configured to control execution of theprogram instruction, and a receiver, wherein: the receiver is configuredto receive a first system message sent by a base station, wherein thefirst system message comprises activation indication information and achange indication tag, the activation indication information indicateswhether a function indicated in an activation system message isactivated, and the change indication tag is a value tag; the processoris configured to detect, whether the scheduling information of theactivation system message is locally stored; determine, according to theactivation indication information, whether the function indicated in theactivation system message is activated in response to the schedulinginformation of the activation system message being locally stored;determine, according to the value tag, that the scheduling informationof the activation system message does not change in response to thefunction indicated in the activation system message being activated; usethe locally stored scheduling information of the activation systemmessage as first scheduling information in response to the schedulinginformation of the activation system message not changing; and thereceiver is further configured to read the activation system messageaccording to the first scheduling information.
 13. The apparatusaccording to claim 12, wherein the processor is configured to obtain anupdated system message according to the first scheduling information.14. The apparatus according to claim 12, wherein the change indicationtag further indicates a change of a second system message, wherein thesecond system message comprises the scheduling information of theactivation system message.
 15. The apparatus according to claim 12,wherein the change indication tag in the first system message does notindicate a change of the activation system message.
 16. The apparatusaccording to claim 12, wherein if the scheduling information of theactivation system message is not locally stored, the receiver is furtherconfigured to receive a second system message sent by the base station,wherein the second system message comprises the first schedulinginformation of the activation system message and scheduling informationof a conventional system message.
 17. The apparatus according to claim12, wherein the activation system message read by the receiver comprisesaccess control information.
 18. The apparatus according to claim 12,wherein in determining that the scheduling information of the activationsystem message does not change, the processor is configured to detectthat the value tag does not change, and determine that the schedulinginformation of the activation system message does not change.
 19. Theapparatus according to claim 12, wherein the apparatus is userequipment.
 20. The computer program product according to claim 12,wherein in determining that the scheduling information of the activationsystem message does not change, the computer program product cause thecomputer to detect that the value tag does not change, and determinethat the scheduling information of the activation system message doesnot change.
 21. A computer program product stored in a non-transitorymedium, comprising instructions which, when executed by a computer,cause the computer to: receive a first system message sent by a basestation, wherein the first system message comprises activationindication information and a change indication tag, the activationindication information indicates whether a function indicated in anactivation system message is activated, and the change indication tag isa value tag; detect whether the scheduling information of the activationsystem message is locally stored; determine, according to the activationindication information, whether the function indicated in the activationsystem message is activated in response to the scheduling information ofthe activation system message being locally stored; determine, accordingto the value tag, that the scheduling information of the activationsystem message does not change in response to the function indicated inthe activation system message being activated; use, the locally storedscheduling information of the activation system message as firstscheduling information in response to the scheduling information of theactivation system message not changing; and read the activation systemmessage according to the first scheduling information.